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Check PrefixMayMatch on Seek()

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Summary:
As a follow-up diff for https://reviews.facebook.net/D17805, add
optimization to check PrefixMayMatch on Seek()

Test Plan: make all check

Reviewers: igor, haobo, sdong, yhchiang, dhruba

Reviewed By: haobo

CC: leveldb

Differential Revision: https://reviews.facebook.net/D17853
This commit is contained in:
Lei Jin
2014-04-25 12:22:23 -07:00
parent 3995e801ab
commit d642c60bdc
8 changed files with 274 additions and 281 deletions
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4
db/table_cache.cc
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@@ -193,7 +193,7 @@ Status TableCache::GetTableProperties(
bool TableCache::PrefixMayMatch(const ReadOptions& options,
const InternalKeyComparator& icomparator,
const FileMetaData& file_meta,
const Slice& internal_prefix, bool* table_io) {
const Slice& internal_key, bool* table_io) {
bool may_match = true;
auto table_reader = file_meta.table_reader;
Cache::Handle* table_handle = nullptr;
@@ -207,7 +207,7 @@ bool TableCache::PrefixMayMatch(const ReadOptions& options,
table_reader = GetTableReaderFromHandle(table_handle);
}
may_match = table_reader->PrefixMayMatch(internal_prefix);
may_match = table_reader->PrefixMayMatch(internal_key);
if (table_handle != nullptr) {
// Need to release handle if it is generated from here.